China CaF2 Double Convex Lens Optical Lens

Calcium Fluoride is often used in spectroscopic windows and lenses due to its high transmission from 350nm to 7μm. Calcium Fluoride is also commonly found in cryogenically cooled thermal imaging systems. Its low absorption and high damage threshold makes it a popular choice for excimer laser optics. Calcium Fluoride's low refractive index allows it to be used without an antireflective coating. The Knoop hardness of Calcium Fluoride is 158.3.
Structure: Double convex lenses
Substrate Material: CAF2
Diameters Available: 2mm to 200mm
Diameter Tolerance: +0.00/-0.05mm or customer design
Surface Quality: 80-50,60-40,40-20,20-10,10-5
Surface Flatness: 1/4lambda or customer design
Surface Irregularity (Peak to Valley): /2 or customer design
Thickness tolerance: +0.00/-0.05mm
Focal length tolerance: +/-1%
Clear Aperture: >90% of Diameter
Chamfer: 0.05-0.5mmx45degree
Centration: 3 arcmin
Coating: AR,Mgf2 are on request

Item#F(mm)f(mm)R1=R2(mm)TcTeFbICC-0016.015.013.462.181.514.24ICC-0026.030.027.291.831.529.34ICC-10112.715.012.915.342.013.05ICC-10212.720.017.704.362.018.46ICC-10312.725.022.393.842.023.66ICC-10412.730.027.043.512.028.77ICC-10512.740.036.313.122.038.92ICC-20125.425.021.2310.112.021.14ICC-20225.435.030.977.452.032.33ICC-20325.450.045.085.652.048.01ICC-20425.475.068.234.392.073.39ICC-20525.4100.091.413.772.098.69ICC-20625.4150.0137.503.182.0148.89ICC-20725.4200.0183.652.882.0199.09ICC-20825.4250.0229.602.702.0249.06ICC-20925.4300.0275.602.592.0299.07ICC-21025.4500.0459.72.352.0499.19ICC-21125.41000.0919.82.182.0999.24ICC-40138.050.044.0611.613.045.81ICC-40238.0100.090.997.013.097.67ICC-40338.0150.0137.095.653.0148.01ICC-40438.0200.0183.234.983.0198.27ICC-40538.0350.0321.404.123.0348.58ICC-40638.0500.0459.503.793.0498.72ICC-40738.0750.0689.503.523.0748.73ICC-40838.01000.0919.603.393.0998.82